On the electromagnetic spectrum, microwaves are located between infrared waves and radio waves. which is true for microwaves?

a)they have a higher frequency than visible light.

b)they have a shorter wavelength than ultraviolet rays.

c)they have a lower frequency than infrared rays.

d)they have a longer wavelength than radio waves.

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Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o

Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.